With the development of science and

With the development of science and technology, especially the high-speed development of single-chip technology and semiconductor technology, more and more attention has been paid to the research and application of single-chip control instruments. At present, with the development of electronic industry, electronic components are increasing rapidly, and the scope of application of electronic components is becoming more and more extensive. Therefore, it is necessary to design a reliable, safe and convenient capacitance tester. The traditional measurement method is not accurate, and the measurement range is relatively small, and it is very inconvenient, which can not meet the needs of modern high-speed development science. Considering the above problems, the system of this graduation thesis uses STC89C52 single-chip microcomputer as the controller, C language programming, intuitive LED LCD display, and 555 multivibrator circuit as the capacitance, so as to achieve Capacitance measurement. Capacitance measuring instrument has many advantages, such as easy to read, intuitive display, various functions, simple circuit, low cost and so on.